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Date: Fri, 16 Aug 2013 16:48:31 -0400
From: Jason Cooper <jason@...edaemon.net>
To: Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Cc: Russell King <linux@....linux.org.uk>,
Andrew Lunn <andrew@...n.ch>,
Gregory Clement <gregory.clement@...e-electrons.com>,
Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
Arnd Bergmann <arnd@...db.de>,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC v1 5/5] ARM: mvebu: add board init for Armada 1500
On Fri, Aug 16, 2013 at 09:41:38PM +0200, Sebastian Hesselbarth wrote:
> This adds initial setup for the Marvell Armada 1500 SoCs. The code
> is fairly straight-forward, but especially _timer_and_clk_init()
> can be simplified by using default arch hooks. I will have some time
> until mach-mvebu is prepared for other SoCs moving over, so I can
> catch up with latest machine simplifications.
>
> I am not so sure about the .map_io but I didn't yet fully understand
> the mapping requirement. Anyway, it is required for iomap and friends
> to work and basically remaps physical register addressed onto the same
> virtual addresses.
>
> Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
> ---
> Cc: Russell King <linux@....linux.org.uk>
> Cc: Jason Cooper <jason@...edaemon.net>
> Cc: Andrew Lunn <andrew@...n.ch>
> Cc: Gregory Clement <gregory.clement@...e-electrons.com>
> Cc: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
> Cc: Arnd Bergmann <arnd@...db.de>
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: linux-kernel@...r.kernel.org
> ---
> arch/arm/mach-mvebu/Kconfig | 15 +++++++++
> arch/arm/mach-mvebu/Makefile | 13 ++++----
> arch/arm/mach-mvebu/armada-1500.c | 63 +++++++++++++++++++++++++++++++++++++
> 3 files changed, 85 insertions(+), 6 deletions(-)
> create mode 100644 arch/arm/mach-mvebu/armada-1500.c
>
> diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
> index 9eb63d7..e2e93ed 100644
> --- a/arch/arm/mach-mvebu/Kconfig
> +++ b/arch/arm/mach-mvebu/Kconfig
> @@ -36,6 +36,21 @@ config MACH_ARMADA_370
> Say 'Y' here if you want your kernel to support boards based
> on the Marvell Armada 370 SoC with device tree.
>
> +config MACH_ARMADA_1500
> + bool "Marvell Armada 1500 boards"
> + select ARMADA_1500_CLK
> + select ARM_GIC
nit, alpha.
> + select CACHE_L2X0
> + select CPU_PJ4B
> + select DW_APB_TIMER_OF
> + select LOCAL_TIMERS if SMP
> + select HAVE_ARM_TWD if LOCAL_TIMERS
alpha.
> + select HAVE_SMP
> + select PINCTRL_ARMADA_1500
> + help
> + Say 'Y' here if you want your kernel to support boards based
> + on the Marvell Armada 1500 SoC with device tree.
> +
> config MACH_ARMADA_XP
> bool "Marvell Armada XP boards"
> select ARMADA_XP_CLK
> diff --git a/arch/arm/mach-mvebu/Makefile b/arch/arm/mach-mvebu/Makefile
> index 2d04f0e..2e10b4a 100644
> --- a/arch/arm/mach-mvebu/Makefile
> +++ b/arch/arm/mach-mvebu/Makefile
> @@ -1,10 +1,11 @@
> ccflags-$(CONFIG_ARCH_MULTIPLATFORM) := -I$(srctree)/$(src)/include \
> -I$(srctree)/arch/arm/plat-orion/include
>
> -AFLAGS_coherency_ll.o := -Wa,-march=armv7-a
> +AFLAGS_coherency_ll.o := -Wa,-march=armv7-a
>
> -obj-y += system-controller.o
> -obj-$(CONFIG_MACH_ARMADA_370_XP) += armada-370-xp.o
> -obj-$(CONFIG_ARCH_MVEBU) += coherency.o coherency_ll.o pmsu.o
> -obj-$(CONFIG_SMP) += platsmp.o headsmp.o
> -obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
> +obj-y += system-controller.o
> +obj-$(CONFIG_MACH_ARMADA_370_XP) += armada-370-xp.o
> +obj-$(CONFIG_MACH_ARMADA_1500) += armada-1500.o
guess what? :)
I swear I had a more substantive comment when I started this. But after
a suitable application of gray matter, these nits were all that were
left. :(
thx,
Jason.
> +obj-$(CONFIG_ARCH_MVEBU) += coherency.o coherency_ll.o pmsu.o
> +obj-$(CONFIG_SMP) += platsmp.o headsmp.o
> +obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
> diff --git a/arch/arm/mach-mvebu/armada-1500.c b/arch/arm/mach-mvebu/armada-1500.c
> new file mode 100644
> index 0000000..b7c556b
> --- /dev/null
> +++ b/arch/arm/mach-mvebu/armada-1500.c
> @@ -0,0 +1,63 @@
> +/*
> + * Device Tree support for Armada 1500 platforms.
> + *
> + * Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
> + *
> + * This file is licensed under the terms of the GNU General Public
> + * License version 2. This program is licensed "as is" without any
> + * warranty of any kind, whether express or implied.
> + */
> +
> +#include <linux/clk-provider.h>
> +#include <linux/clocksource.h>
> +#include <linux/kernel.h>
> +#include <linux/init.h>
> +#include <linux/io.h>
> +#include <linux/of_platform.h>
> +#include <asm/hardware/cache-l2x0.h>
> +#include <asm/mach/arch.h>
> +#include <asm/mach/map.h>
> +#include <asm/mach/time.h>
> +#include "common.h"
> +#include "coherency.h"
> +
> +#define ARMADA_1500_REG_BASE_VIRT 0xf6000000
> +#define ARMADA_1500_REG_BASE_SIZE 0x03000000
> +
> +static struct map_desc armada_1500_io_desc[] __initdata = {
> + {
> + .virtual = ARMADA_1500_REG_BASE_VIRT,
> + .pfn = __phys_to_pfn(ARMADA_1500_REG_BASE_VIRT),
> + .length = ARMADA_1500_REG_BASE_SIZE,
> + .type = MT_DEVICE,
> + },
> +};
> +
> +static void __init armada_1500_map_io(void)
> +{
> + iotable_init(armada_1500_io_desc, ARRAY_SIZE(armada_1500_io_desc));
> +}
> +
> +static void __init armada_1500_timer_and_clk_init(void)
> +{
> + of_clk_init(NULL);
> + clocksource_of_init();
> +}
> +
> +static void __init armada_1500_dt_init(void)
> +{
> + l2x0_of_init(0x70c00000, 0xfeffffff);
> + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
> +}
> +
> +static const char * const armada_1500_dt_compat[] = {
> + "marvell,armada-1500",
> + NULL,
> +};
> +
> +DT_MACHINE_START(ARMADA_1500_DT, "Marvell Armada 1500")
> + .init_machine = armada_1500_dt_init,
> + .map_io = armada_1500_map_io,
> + .init_time = armada_1500_timer_and_clk_init,
> + .dt_compat = armada_1500_dt_compat,
> +MACHINE_END
> --
> 1.7.10.4
>
--
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